package com.core.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * 直接通过Spring 上下文获取SpringBean,用于多线程环境
 * 
 */
@Component
public class SpringContextUtil implements ApplicationContextAware {

	// Spring应用上下文环境
	private static ApplicationContext applicationContext;

	/**
	 * 实现ApplicationContextAware接口的回调方法，设置上下文环境
	 */
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		SpringContextUtil.applicationContext = applicationContext;
	}

	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	/**
	 * 获取对象 这里重写了bean方法，起主要作用
	 * example: getBean("userService")//注意： 类名首字母一定要小写！
	 */
	public static Object getBean(String beanId) throws BeansException {
		return applicationContext.getBean(beanId);
	}

}

